Generating comprehensive symbol tables for source code files

1. A computer program product, the computer program product comprising one or more computer readable storage medium and program instructions stored on said one or more computer readable storage medium, said program instructions comprising instructions to: identify a primary symbol table, said primary symbol table being associated with a primary PL/I source code file; identify a secondary symbol table, said secondary symbol table being associated with a secondary PL/I source code file; receive a source code association indication, said source code association indication denoting at least one association relationship between said primary PL/I source code file and said secondary PL/I source code file; create a comprehensive symbol table, said comprehensive symbol table comprising contents of said primary symbol table and contents of said secondary symbol table; retrieve said comprehensive symbol table; receive one or more user source code textual inputs from one or more users, said one or more user source code textual inputs being associated with said primary PL/I source code file; use said comprehensive symbol table to generate zero or more auto-completion suggestions that facilitate at least one of creating and editing of said primary PL/I source code file; determine said zero or more auto-completion suggestions based on said one or more user source code textual inputs and said comprehensive symbol table; and display said zero or more auto-completion suggestions to said one or more users in the context of at least one instance of said primary PL/I source code file.